diff --git a/requirements.txt b/requirements.txt
index 84c55f0..230b824 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ MarkupSafe==1.0
 mistune==0.8.3
 nbconvert==5.3.1
 nbformat==4.4.0
-notebook==5.4.0
+notebook==6.4.12
 pandocfilters==1.4.2
 parso==0.1.1
 pdfminer.six==20170720